Pulling-cap for drill-casings.



A.- G. LUDLUM. PULL'ING GAP FOR DRILL GASINGS.

APPLICATION FILED AUG. 31, 19 0.

984,826. 4 Patented Feb.21, 1911.

WITNESSES:

1n: NORRIS PETERS 00., WASHINGTON, n c.

, entrain srarns PATENT onrion.

ALBERT C. LUDLUM, OF NEW YORK, N. Y., ASS-IGNOR TO NEW YORK ENGINEERING COMPANY, A CORPORATION OF NEW YORK.

PULLING-GAP FOR DRILL-CASINGS.

esaeze.

Specification of Letters Patent.

Application filed August 31, 1910.

Patented Feb. 21, 1911. Serial No. 579,879.

To all whom it may concern:

Be it known that I, ALBERT C. LUDLUM, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented an Improved Pulling-Cap for Drill-Casings, of which the following is a specification.

This invention relates to an improved pulling cap for drill casings.

The invention seeks to provide a strong efficient and convenient device which may be readily attached to the upper end of a drill casing to enable it to be pulled from the drilled hole.

The invention consists of the structure hereinafter set forth and pointed out in the claims.

In the accompanying drawings forming part of this specification and in which like reference numerals designate corresponding parts in the several views, the invention is shown in its preferred embodiment.

Figure 1. is a perspective view of the invention. Fig. 2. is a central cross section. Fig. 3. is a cross section of the body portion on the line 3 of Fig. 1.

Referring now to the particular structure as shown in the drawings, a casting constituting the body portion 1 has a central thickened portion to provide an internally threaded socket 2 adapted to be screwed on the upper end of the casing. On either side of the socket the casting is formed with a web like portion designated 3 and 4, and provided with flanges 5 and 6 located on opposite side edges of the web like portions. This is the preferred form of the body portion.

7 and 8 are eye-pieces fixed to the body portion, one on either side of the socket 2, In the preferred arrangement these eyepieces have tongues 9 and 10 embracing and riveted to the web like portions 3 and 4;, these eye-pieces extending outward in opposite directions from the body portion and each extending from a side edge opposite a flange, as shown.

11 is a large central eye-piece swiveled to the body portion in alinement with the socket 2. In the preferred arrangement this eyepiece 11 has a stem 12 passing loosely down through the socket and there rotatably secured by the nut 13.

In the operation of the device, when it is desired to pull out the drill casing, the cap is firmly secured to the upper end of the cascasing. Poles are then inserted in the eyepieces 7 and 8, and far enough to bear against the flanges 5 and 6, which not only strengthen the body portion but afford an extended bearing for the inner ends of said poles. The outer ends of the poles may project six or eight feet, more or less, outward from the eye-pieces. A heavy pole is then inserted through the eye 11 and having been suitably fulcrumed is operated as a lever to lift upward on the cap. At the same time the poles in the eye-pieces 7 and 8 are grasped by the operators and the cap and casing are rotated to loosen the casing in its hole and facilitate the work of the lifting lever operating in the eye 11.

It will be obvious that one of the eyepieces 7 or 8 may be dispensed with, together with its end of the body portion. By arranging the eye-pieces 7 and 8 so as to extend laterally from a side edge of the body portion the device is made especially compact and rotates in a small circle. Thus it read ily clears the near by fulcrum of the pulling lever which engages the eye-piece 11.

What I claim and desire to secure by Letters Patent is:

1. A pulling cap for drill casings comprising a body portion having a socket for connection with the end of the casing, an eyepiece swiveled to the body portion in alinement with said socket and projecting above the body portion, and an eye-piece fixed to the body portion at one side of the swiveled eye-piece.

2. A pulling cap for drill casings comprising a body portion having a socket for connection with the end of the casing, a swiveled eye-piece having a stem passing loosely down through said socket and there rotatably secured, and an eye-piece fixed to the body portion at one side of the swiveled eyepiece.

3. A pulling cap for drill casings comprising a body portion having a socket for connection with the end of the casing, an eyepiece swiveled to the body portion in alinement with said socket and projecting above the body portion, and an eye-piece fixed'to the body portion at one side of the swiveled eye-piece and extending laterally from and beyond a side edge of the body portion.

4. A pulling cap for drill casings comprising abody portion having a socket for coning by screwing its socket onthe end of the nection with the end of the casing, an eyeplece sw1veled to the body portlon 1n alinenient Wltll said socket and pro ect1ng above the body portion, and an eye-piece fixed t0- the body portion at one side of the swiveled eye-piece and extending laterally from and beyond a side edge of the body portion, said edge being provided with a flange to provide an extended bearing for one end of a turning lever to be engaged by said eye-piece.

5. A pulling cap for drill casings comprising a body portion having a socket for connection with the end of the casing, a central eye-piece having a stem passing loosely down through said socket and there rotatably secured, and eye-pieces fixed to the body portion, one on either side of the central eyepiece, said eye-pieces extending from and beyond the opposite side edges of the body portion, each edge of which constitutes an extended bearing for one end of a turning lever to be engaged by an eyepiece.

G. A pulling cap for drill casings comprising a casting having a central thickened portion providing a threaded socket for connection with the end of the casing, said casting having web-like end "portions each of which is provided with a flange, said flanges being on opposite side edges of the web-like portions, eye-pieces having tongues riveted to the end portions on opposite sides thereof, each eye-piece extending from a side edge of the body portion and opposite a flange thereof, and a central eye-piece having a stem passing loosely down through the said socket and there rotatably secured.

In testimony whereof, I have signed my A. G. LUDLUM.

Witnesses:

ANNA CAREY DILLs, CHAS. V. DRAKE. 

